Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d21a35f36437d1…

MALICIOUS

PDF

35.6 KB Created: 2020-10-28 10:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068378c9d9ca1090dc72ff5a1e41ae78 SHA-1: 76198a5983a275ab4d08e9d8d8ebd7ed52f385eb SHA-256: f7d21a35f36437d1a3bbcd2bcd8466b9b686fb0fe2bcb911c84e08102002d987
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ggtraff.ru/strik?keyword=post+mortem+of+a+protagonist+to+kill+a+mockingbird, is identified as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting its primary purpose is to lure the user to this malicious site. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=post+mortem+of+a+protagonist+to+kill+a+mockingbird
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdf
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/ceaf0127784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c505ced-5ec7-4f3d-bc04-65d948a9cf1c/dagofitulabasajunavosofa.pdf
    • https://uploads.strikinglycdn.com/files/3849e1be-21c1-4fda-bb80-c61c28d1a751/73666884211.pdf
    • https://uploads.strikinglycdn.com/files/da4a5aab-5d0c-4cab-89a2-ec9097ae4caa/19400682511.pdf
    • https://uploads.strikinglycdn.com/files/cec0c670-9213-4516-9969-dcaa8bece39c/sochenge_tumhe_pyar_new_version_song.pdf
    • https://uploads.strikinglycdn.com/files/06e09259-fa9c-487a-8245-9578b7b454b9/conditionals_0_1_2_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/ebe132af-bd5b-4f68-a819-53b688f90505/44167630040.pdf
    • https://uploads.strikinglycdn.com/files/bb3ef0f8-c953-4263-aeb2-da21b1aaf2b3/yajur_veda_sandhyavandanam_in_tamil_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/24253553117.pdf
    • https://cdn.shopify.com/s/files/1/0433/5153/9866/files/bobesowavidavirapiwa.pdf
    • https://cdn.shopify.com/s/files/1/0504/5390/5562/files/bhakti_the_art_of_eternal_love.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/64311537921.pdf
    • https://s3.amazonaws.com/fasanag/71107286407.pdf
    • https://s3.amazonaws.com/tezofuretejom/tukebajiximotudipok.pdf
    • https://s3.amazonaws.com/wexoteluwag/kannada_opposite_words_list.pdf
    • https://s3.amazonaws.com/najubu/gapaxalekibiteja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/history_of_jahiliyyah_period.pdf
    • https://cdn.shopify.com/s/files/1/0498/0909/6861/files/screen_size_android_chart.pdf
    • https://cdn.shopify.com/s/files/1/0495/5285/1111/files/afman_23-110_volume_1.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005449.bin
239d5cbc7c84760d5a87054e47ae910dc030f4117e417969de1b8e895665d3d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5449 5680 bytes
font_01_sfnt_off00006777.bin
21359b1fcb4a9adec78e3037773ea1415897377d0c8f05d0207bccc85a53f571
pdf-font-stream PDF embedded font (sfnt) at offset 0x6777 9524 bytes